Replacing your windows is one of the works that most quickly improves the comfort and energy efficiency of a home. In Luxembourg, this choice deserves careful consideration.
Why Replace Your Windows in 2026?
Poorly performing windows can account for up to 25% of heat loss. To be eligible for Klimabonus grants, your new windows must have a Uw coefficient of 1.0 W/m²K or less.
PVC: Unbeatable Value for Money
Its strengths:
- Lowest price on the market
- Excellent thermal insulator
- No maintenance required
- Lifespan of 30 to 40 years
Its limitations:
- More standard appearance
- Limited colour choice
Indicative price: €300 to €600 per standard window installed
Aluminium: Modernity and Performance
Its strengths:
- Ultra-slim profiles
- Unlimited colour range
- Lifespan of 40 to 50 years
- Ideal for large glazed openings
Its limitations:
- Highest price
- Requires thermal break
Indicative price: €600 to €1,200 per standard window installed
Wood: The Natural Insulator with Character
Its strengths:
- Excellent natural insulator
- Noble, warm appearance
- Lifespan exceeding 50 years
- Renewable material
Its limitations:
- Regular maintenance required (every 5 to 10 years)
- Sensitive to humidity if poorly maintained
Indicative price: €500 to €900 per standard window installed
Complete Comparison Table
| Criterion | PVC | Aluminium | Wood |
|---|---|---|---|
| Price per window | €300 - €600 | €600 - €1,200 | €500 - €900 |
| Thermal insulation (Uw) | 0.8 to 1.2 | 1.0 to 1.4 | 0.9 to 1.2 |
| Maintenance | None | None | Every 5-10 years |
| Lifespan | 30-40 years | 40-50 years | 50+ years |
| Customisation | Limited | Very high | Total |
| Protected zones | Sometimes refused | Sometimes refused | Accepted |
Klimabonus Grants for Windows
Window replacement is eligible for Klimabonus if the Uw coefficient is 1.0 W/m²K or less. The grant is calculated per m² of glazed area.
How to Choose Based on Your Situation?
- Contemporary house: Aluminium is the natural choice
- Older house or protected zone: Wood is recommended
- Limited budget: PVC offers excellent performance
- Best compromise: Wood-aluminium composite (€800 to €1,400/window)
Find Your Joiner on tack.lu
Want to replace your windows? Describe your project and receive up to 3 free quotes from qualified joiners.
FAQ
Triple glazing or double glazing?
In Luxembourg, triple glazing is recommended for main living areas. It is generally required to achieve the best Uw coefficients.
Can you mix materials in the same house?
Yes, but it’s not advisable for aesthetic reasons. It’s possible if different facades have different constraints.
What’s the lead time for made-to-measure windows?
Allow 4 to 8 weeks for manufacturing depending on the material, plus 2 to 3 days for installation.
